带BRB的钢筋混凝土加层框架结构减震性能分析

Anti-seismic Performance Analysis of BRB Supported RC Frames for Building Recon-struction with Storey-adding

本文对加层后抗侧刚度不足的钢筋混凝土框架结构布置屈曲约束支撑,以满足弹性位移角限值的设计要求。运用ANSYS软件对加层后的整体结构进行两种不同地震波作用下的动力时程分析,确定各楼层的层间位移角,对不满足要求的楼层布置屈曲约束支撑,然后对加支撑后的加层框架结构进行多遇地震和罕遇地震下的抗侧移验算。结果表明,加屈曲约束支撑后,结构的层间位移角满足规范要求,且具有良好的耗能减震性能。

This paper is studied for RC frame which is stiffness-insufficient for storey-adding and provides a design process of the buckling-restrained braces to meet the elastic displacement angle limitation.With a project example,the elastic time history analysis of the entire construction is carried out first by using software ANSYS to input the two different seismic waves,then the storey drift angles are determined.The buckling restraining braces are installed in those building storeys where the story drift angle between two storeys does not agree with the norms.Finally,the entire construction is checked for the case of common and uncommon seismic action.As a result,the story drift angle of the RC frame with buckling-restrained braces decrease distinctly,and the structure can dissipate earthquake energy fully.